Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
gian lang » gian dan
tuan bang » tuan dang, tuan hoang, thuat bang
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong san, cong tan, huong dan
dan han » dan chan, dan than, dan hanh
han tap » han tai, toan tap, nhan tai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu manh - canh tranh ((gian lang) or (tuan bang)) cong dan han tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - canh tranh ((gian lang) OR (tuan bang)) cong dan han tap*.